目的　探讨初始音强度差对听力正常青年人畸变产物耳声发射 (DPOAE)幅值的影响 ,为临床应用DPOAE提供最佳的刺激强度组合。方法　用IHSVersion 3 2型耳声发射仪对听力正常青年人 39耳进行了DPOAE测试 ,分别记录L1为 75、6 5、5 5dBSPL ,强度差L1-L2 为 0、5、10、15dBSPL时 ,不同L1-L2 值对DPOAE幅值的影响。结果　当L1为 75dBSPL时 ,减少L2 使DPOAE幅增加 ,而在低、高频处 ,L1-L2 对DPOAE幅值的改变不明显。结论　L1-L2 对DPOAE幅值的影响因L1的强度和刺激频率而改变 Objective To investigate the effect of initial sound intensity difference on the amplitude of distortion product otoacoustic emissions (DPOAE) in young adults with normal hearing, and to provide the best intensity combination for DPOAE in clinic. Methods The IOAVersion 3 2 type otoacoustic emission apparatus was used to measure the DPOAE of 39 ears of normal hearing young adults. The differences of L1, L2, L2, Effect of L1-L2 Value on DPOAE Amplitude. Results When L1 is 75dBSPL, the decrease of L2 increases DPOAE amplitude. However, the change of DPOAE amplitude of L1-L2 is not obvious at low frequency and high frequency. Conclusion The influence of L1-L2 on the amplitude of DPOAE varies with the intensity of L1 and the frequency of stimulation